Bsi bs en 04700 006 2010

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BSI Standards Publication

BS EN 4700-006:2010

Aerospace series — Steel and heat resisting alloys — Wrought products — Technical specification

Part 006: Pre-production and production forgings

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`,,```,,,,````-`-`,,`,,`,`,,` -This British Standard is the UK implementation of EN 4700-006:2010 The UK participation in its preparation was entrusted to Technical Committee ACE/61/-/48, Heat Resisting Alloys for Aerospace Purposes.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application.

© BSI 2010 ISBN 978 0 580 55076 8 ICS 49.025.10

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2010.

Amendments issued since publication

production forgings

Série aérospatiale - Aciers et alliages résistant à chaud -

Produits corroyés - Spécification technique - Partie 006:

Pièces types et pièces de série

Luft- und Raumfahrt - Stahl und Hochwarmfesten Legierungen - Umgeformte Erzeugnisse - Technische Lieferbedingungen - Teil 006: Ausfallmuster und

Serienschmiedestücke

This European Standard was approved by CEN on 9 January 2010

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member

This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E FÜ R N O R M U N G

Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2010 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members

Ref No EN 4700-006:2010: E

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`,,```,,,,````-`-`,,`,,`,`,,` -Contents

Foreword 3



Introduction 4



1





2





3





4





5





6





6.1





6.2





6.3





6.4





6.5





6.6





6.7





6.8





6.9





6.10





This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2011, and conflicting national standards shall be withdrawn at the latest by March 2011

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom

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EN ISO 3651-1, Determination of resistance to intergranular corrosion of stainless steels — Part 1: Austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in nitric acid medium by measurement of loss in mass (Huey test) (ISO 3651-1:1998)

EN ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing sulfuric acid

(ISO 3651-2:1998)

EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1:2005)

EN ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method (ISO 6507-1:2005)

EN ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F,

BS EN 4700-006:2010

EN 4700-006:2010 (E)

5

EN 2032-1, Aerospace series — Metallic materials — Part 1: Conventional designation

EN 2032-2, Aerospace series — Metallic materials — Part 2: Coding of metallurgical condition in delivery condition

EN 2078, Aerospace series — Metallic materials — Manufacturing schedule, inspection schedule, inspection and test report — Definition, general principles, preparation and approval

EN 2950, Aerospace series — Test method — Wrought heat resisting alloys — Semi-finished products and parts — Conditions for macrographic and micrographic examination — Atlas of structures and defects

EN 2951, Aerospace series — Metallic materials — Test method — Micrographic determination of content of non-metallic inclusions 1)

EN 3874, Aerospace series — Test methods for metallic materials — Constant amplitude force-controlled low cycle fatigue testing 1)

EN 3987, Aerospace series — Test method for metallic materials — Constant amplitude force-controlled high cycle fatigue testing 1)

EN 3988, Aerospace series — Test methods for metallic materials — Constant amplitude strain-controlled low cycle fatigue testing 1)

EN 4050-1, Aerospace series — Test method for metallic materials — Ultrasonic inspection of bars, plates, forging stock and forgings — Part 1: General requirements 1)

EN 4050-4, Aerospace series — Test method for metallic materials — Ultrasonic inspection of bars, plates, forging stock and forgings — Part 4: Acceptance criteria 1)

EN 4259, Aerospace series — Metallic materials — Definition of general terms 1)

EN 9100, Quality Management Systems — Requirements for Aviation, Space and Defence Organizations

EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace standard parts

EN 10027-1, Designation systems for steels — Part 1: Steel names

EN 10045-1, Metallic materials — Charpy impact test — Part 1: Test method

EN 10079, Definition of steel products

TR 2410, Aerospace series — Metallic materials — Relationship between dimensional standards and material standards 2)

AMS 2315, Determination of Delta Ferrite Content 3)

AMS 2750, Pyrometry 3)

2) Published as ASD-STAN Technical Report at the date of publication of this standard by Aerospace and Defence Industries Association of Europe-Standardization (ASD-STAN), (www.asd-stan.org)

3) Published by: SAE National (US) Society of Automotive Engineers http://www.sae.org/

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`,,```,,,,````-`-`,,`,,`,`,,` -ASTM E709, Standard Guide for Magnetic Particle Testing 4)

ASTM E1444, Standard Practice for Magnetic Particle Testing 4)

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 4259 apply For definitions specific

 material standard number;

 delivery condition and metallurgical code of products;

 dimensions and tolerances or reference to an appropriate dimensional standard;

 product designation, when required;

 forwarding address;

 nature and type of packing, if required;

 surface protection, if appropriate;

 definition and frequency of any special tests and their retest procedures, if required

5 Health and safety

Products in the delivery condition shall fulfil the health and safety laws of the area of the country when and where it is to be delivered

A product safety data sheet shall be available

4) Published by: ASTM National (US) American Society for Testing and Materials http://www.astm.org/

6.2 Qualification requirements

See line 100 in Table 3 of this technical specification

Qualification shall normally comprise assessment of pre-production forgings See Table 2, section 4.2

6.3 Re-qualification requirements

Re-qualification of serial production forgings may be required, in the following cases:

 modification of the drawing;

 use of forging stock from a different source;

 modifications to the forging stock form and/or manufacturer route;

 modifications to an existing die;

 use of a new (replacement) die;

 modifications to the forging manufacturing route;

 when a significant time interval (usually several years) had elapsed between forging campaigns for a specific part number;

 when required by the purchaser for any other reason

Re-qualification testing requirements, especially location of test pieces, shall be identical to those used for the initial qualification of the pre-production forgings unless otherwise specified on the order, drawing or inspection schedule

6.4 Release requirements

Release testing shall be the responsibility of the manufacturer The sampling procedure for release testing shall be one of the following, as specified on the order, drawing or inspection schedule Where no procedure

is specified, procedure A shall be used:

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`,,```,,,,````-`-`,,`,,`,`,,` - Procedure A: Separate forged test samples shall be procedure produced from the same batch of forging

stock as that used to make the serial production forgings Procedure A may be used alone unless

denoted AX on the drawing, order or inspection schedule in which case it shall be applied only in

conjunction with procedure X (See 6.5)

 Procedure B: Separate forged heat treatment control test samples shall be prepared which conform to

the same material standard as the production forgings, but from a different batch of forging stock

Procedure B shall only be used when full heat treatment of the serial production forgings is carried out

by the manufacturer and only in conjunction with procedure X (See 6.5)

 Procedure C: Integral test samples shall be removed from each forgings The order, drawing of

inspection schedule shall specify how many test samples shall be tested per batch Procedure C may be

used alone unless denoted CX on the drawing, order or inspection schedule in which case it shall be

applied only in conjunction with procedure X (See 6.5)

 Procedure D: Test samples shall be machined from forging(s) selected from each production batch and

at locations specified on the order, drawing or inspection schedule

When required, the manufactured shall inform the purchaser of the planned dates for extraction of samples

and release testing in order that these operations may be witnessed

6.5 Process control testing (Procedure X)

Procedure X is process control procedure consisting of periodic “cut-up” testing to ensure that the serial

production forgings continued to conform to the specified requirements

If procedure X is invoked by the order, drawing or inspection/manufacturing schedule and/or if procedures B,

AX or CX are used for release tests (see 6.4), forgings shall be selected from series production at the

frequency stated therein It is recommended that the maximum number of forgings manufactured between

repeat “cut-up” testing conforming to procedure X shall be as stated in the following Table 1:

Table 1 Mass of forging (kg) Number of forgings

> 25 As stated on the order, drawing, inspection schedule

The testing requirements, including the location, type and size of test pieces shall be identical to those used

for qualification of the pre-production

6.6 Retests

Retests shall be required if the specified acceptance criteria are not fully met during qualification testing on

pre-production forgings, process control testing (procedure X) or batch release testing

If the test product or test piece preparation is faulty, testing shall be re-applied at the original frequency after

rectification of the original cause of failure At least one of the retests shall be from forgings from which the

unsatisfactory result was obtained (unless already rejected by the manufacturer after suitable identification of

the cause of failure) It insufficient material remains, the purchaser shall advise as to how to proceed

on the drawing, together with values which are acceptable for that location Alternatively, if it is essential that the specified acceptance criteria are achieved at all locations, the purchaser may request modifications to be made to the manufacturer route

b) For process control testing (procedure X), the tests shall be repeated on a second forging taken as close

as possible to the above in the production sequence and/or and extensive review shall be made of the manufacturing records of forgings made since the previous control tests Serial production of the forging

in question (and others if appropriate/deemed necessary) shall not continue until the cause of the unsatisfactory values has been ascertained and rectified)

c) For batch release testing, the batch shall be either:

 rejected, or

 partially of fully re-heat treated if it is believed that re-heat treatment can rectify the cause of the failure and then test as a completely new batch from which the conforming products shall be accepted The re-heat treatment shall be stated on the test and inspection report No products or test sample shall be re-heat treated more than once

6.7 Special tests

Special tests and/or inspections may be required by the purchaser In such cases, the nature of the test, method, frequency and technical requirements shall be specified on the order, drawing or inspection schedule and shall be mutually agreed by the manufacturer and purchaser

6.8 Capability clause

The capability clause normally applies only to forgings of suitable size and configuration during process control testing (procedure X) and/or batch release testing when invoking procedure D The number of batches after which sufficient statistical evidence is deemed to justify cessation of testing for a particular property (or reduced frequency of testing) shall be mutually agreed between the manufacturer and purchaser However, this is no way reduces, the obligations of the manufacturer to fulfil the requirements If subsequent testing indicates that the product does not comply with the requirements, the batch shall be rejected

6.9 Statistical process control

Reduction in the extent of release testing, other than that defined in 6.7 above may be negotiated with the purchaser on the basis of appropriate statistical process control and/or statistical data

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`,,```,,,,````-`-`,,`,,`,`,,` -6.10 Inspection and test report

The manufacturer shall furnish, with each delivery, a report conforming to the requirements of EN 2078 stating the following:

 manufacturer’s name and address;

 order number;

 drawing and/or part number;

 material standard number;

 delivery condition and metallurgical code of the product;

 quantity of forgings;

 cast and batch number;

 batch and/or test samples heat treatment, if appropriate;

 results of all tests, retests and chemical analysis

`,,```,,,,````-`-`,,`,,`,`,,` -BS EN 4700-006:2010

EN 4700-006:2010 (E)

11

Table 2 — Technical requirements for lines 1 to 29, where appropriate

Material standard line

reference Requirements

Frequency of testing

Qualification Release

No Title

2 Chemical composition The chemical composition of the alloy shall comply with requirements of the material standard

The samples taken for analysis shall be representative of the melt

The method of analysis shall be at the option of the manufacturer, but in cases of dispute, the reference method set out in the relevant EN or ISO standard shall be used If no EN or ISO standard exists, a fundamental and agreed method of chemical analysis calibrated against accepted reference standards shall be used

In the case of remelted material, samples shall be normaly taken from the top of each ingot or ingot product

a) Vacuum arc remelted (VAR) ingots: the top of each ingot or ingot product

b) Electroflux or Electroslag remelted (ESR) ingots: the top and bottom ends of each ingot or ingot product

An analysis shall be made of each sample and certificates of analysis shall be supplied to the purchaser

The elements to be determined shall be as required by the material specification or as agreed between the manufacturer and the purchaser

Elements not quoted in the material standard shall not be intentionally added to the alloy without the agreement of the purchaser, except for the purpose of finishing the heat (e.g addition of deoxidant);

reasonable precautions shall be taken to prevent their inclusion during manufacture The purchaser, in agreement with the manufacturer, may set a limit to the amount of one or more such elements and may require the amount of such elements to be stated in the certificate of analysis

The specified ranges of chemical composition are based on cast analyses Any subsequent analytical checks shall take into consideration the heterogeneity normal to the alloy

Additionally for remelted products, the samples shall be representative for the remelted ingot, taking into account any macro segregation

The test samples used for chemical analysis shall be representative of the product and shall be taken from location corresponding to top and bottom of each ingot produced after the final melting stage The method of chemical analysis shall be at the discretion of the manufacturer unless otherwise stated in the material standard or order In cases of dispute, the method of chemical analysis shall be agreed between the manufacturer and purchaser preferably using existing chemical analysis standards The measured chemical composition shall be stated on the certificate of conformance

a) 1 per cast in the case of air melted or vacuum induction melted product b) 1 per VAR or

2 ESR ingot representing top and bottom positions

a) 1 per cast in the case of air melted or vacuum induction melted product b) 1 per VAR or ESR ingot

continued

`,,```,,,,````-`-`,,`,,`,`,,` -EN 4700-006:2010 (E)

Table 2 — Technical requirements for lines 1 to 29, where appropriate (continued)

Material standard line

reference Requirements

Frequency of testing

Qualification Release

No Title

3 Method of melting 1 General

The alloy shall be made by the process required by the material standard, unless otherwise agreed between the manufacturer and purchaser If a specification permits alternative processes, the manufacturer shall decide which of them shall be used unless the purchaser states a particular preference on his order In all instances, the process by which the alloy was made shall be indicated on the release note

2 Consumable electrode remelted material 2.1 Except as provided in 2.3 or 2.4 at no time during remelting shall material of any other composition or

type be introduced into the melting chamber, i.e starter material and electrode stub-ends shall be of the same composition as the material being remelted

2.2 Whenever possible and except as provided in 2.3, weld material used to join electrodes together and

to join the electrode to the stub-end shall be of the same composition as the material being remelted If such weld material is not obtainable, material of a similar composition to, or compatible with, the material being remelted may be used at the discretion of the manufacturer, unless the purchaser indicates that his prior agreement is required

2.3 Alternatively to 2.1 and 2.2, for electroflux and vacuum arc remelting, the stub and any weld material

may be different from that being remelted, provided that the remelted material is not contaminated with material from the stub-ends or weld and that, for vacuum arc remelting, the stub welding takes place outside the furnace Remelting shall be terminated not less than 20 mm from the electrode/stub interface and, after completion of the remelting cycle, the electrode/stub interface shall be examined to verify that the stub and weld are intact

2.4 For electroflux melting, material compatible with the composition of that being remelted shall be

permitted to provide electrical contact to the furnace base plate, provided that the chemical composition

of the melt is maintained

continued

BS EN 4700-006:2010

EN 4700-006:2010 (E)

13

Table 2 — Technical requirements for lines 1 to 29, where appropriate (continued)

Material standard line

reference Requirements

Frequency of testing

Qualification Release

No Title

4.2 Method of production Pre-production forgings:

Prior to commencing series production of a particular design, pre-production forgings shall be produced in order to qualify the method of manufacture and equipment configuration and to demonstrate that the requirements of the purchaser can be met

The following requirements shall be specified on the order, drawing and/or inspection schedule:

 number of pre-production forgings to be produced for evaluation/qualification;

 heat treatment condition of the pre-production forgings including any requirements for machining prior

 whether an agreed method of manufacture is required

The pre-forgings shall be made from forging stock complying with the relevant EN material standard

Evaluation/qualification of the pre-production forgings shall be carried out an include those inspections and tests which will be performed on production forgings All manufacturing parameters as well as test and inspection details and results shall be recorded and compiled into an inspection and testing report to allow definition of the optimum techniques to be used for production forgings including, where appropriate, the ultrasonic test method (probe, frequency, angle of incidence …)

When all inspection and test results relating to pre-production forgings have been reported and considered as satisfactory by the purchaser, the manufacture shall compile a manufacturing schedule in accordance with EN 2078 and EN 9133 defining the forging stock, optimised production processes and inspection requirements This shall be made available to, and/or be subject to written agreement with the purchaser as required

Series production shall commence when written agreement or an order has been received from the purchaser

Production forgings:

The method of manufacture of production forgings shall be the same as that used for the manufacture of the pre-production forgings and in strict accordance with the manufacturing schedule Any change in the forging requiring a revised drawing and/or change in method of manufacture shall only be made following written approval from the purchaser The purchaser shall decide if re-qualification of new pre-production forgings is required If any changes to the method of manufacture are made, the manufacturing schedule and inspection schedule shall be modified accordingly and subject to the same approval process as the original documents

Each forging shall be traceable to the cast, production batch and/or heat treatment batch at all stages of manufacture, testing and delivery

continued

`,,```,,,,````-`-`,,`,,`,`,,` -EN 4700-006:2010 (E)

Table 2 — Technical requirements for lines 1 to 29, where appropriate (continued)

Material standard line

reference Requirements

Frequency of testing

Qualification Release

No Title

5 Technical specification Reference to this technical specification EN 4700-006

In cases if conflict, the requirements of the drawing, order or inspection schedule shall take precedence over those of this technical specification and the material standard The requirements of the material standard shall take precedence over those of this technical specification See also EN 4258

6.1 Delivery condition Product shall be supplied in the delivery condition specified in this line in the material standard and/or as

stated on the order

Marking:

The method of marking used shall not cause corrosion, crack initiation, contamination or unacceptable deformation The marking shall remain permanently visible after handling and contact with protective products

Unless otherwise specified, the nature and colour of marking ink and type of marking characters shall be left to the discretion of the manufacturer The marking inks shall be removable with cleaning products which do not leave a residue which could affect further processing The cleaning products shall not give rise to corrosion

Each forging shall bear the following identification marking:

 material standard number;

 delivery condition code;

 part or drawing number, and serial number, if required;

 batch number;

 identification of the manufacturer and, where appropriate, of plant;

 inspection stamp if required

Unless otherwise indicated on the drawing, order or inspection schedule, the method of marking shall be

at the discretion of the manufacturer

The method of marking shall have no detrimental effect on the forging

If shape or size does not permit the marking all the above requirements, the amount of marking may be reduced (codified, contracted, etc.) by agreement between the manufacturer and the purchaser provided traceability to the required information is maintained Alternatively the forgings shall be packed in bags or bundles each of which shall carry a durable label bearing the information required above

continued